פִּרְיָה, (פָּרָה) increase; פ׳ ורביה (with ref. to פרו ורבו, Gen. I, 28) the duty of propagating the human race, the duty of marrying; marital duty. M. Kat. 8ᵇ מפני ביטול פ׳ ור׳ because it might cause a diminution of marriages (as people might defer marriages for the festive season as most convenient). Gen. R. s. 8 האיש מצווה על פ׳ ור׳ וכ׳ the duty of marrying has been put on man, but not on woman; Tanḥ. Noah 12. Yeb. 62ᵃ קיים פ׳ ור׳ he has complied with the duty of propagation (and need not marry again). Ib. דמעיקרא נמי בני פ׳ ור׳ נינהו for they were subject to the duty of propagation before they became Jews (it being one of the Noachidian laws, Gen. IX, 7); a. fr.